Optical measurement of the Soret coefficient of ethanol/water solutions

We have employed a laser‐beam‐deflection technique to measure the Soret coefficient of ethanol/water solutions with ethanol weight fractions ranging from 0.02 to 0.39, over the temperature range 10 to 40 °C. This technique also allows precise determination of the mass‐diffusion coefficient and of the index of refraction. These results have permitted us to obtain a quantitative understanding of recent experiments on oscillatory traveling‐wave convection in binary fluid mixtures.

[1]  W. WashburnE.,et al.  International Critical Tables , 1927 .

[2]  R. Stokes,et al.  Diffusion in binary liquid mixtures. Part 1.—Diffusion coefficients in the system ethanol + water at 25° , 1953 .

[3]  Brand,et al.  Exact solution of the linear-stability problem for the onset of convection in binary fluid mixtures. , 1987, Physical review. A, General physics.

[4]  C. J. Gorter,et al.  Etude sur la diffusion thermique dans des mélanges liquides alcool-eau au moyen de la méthode thermogravi- tationnelle de séparation , 1946 .

[5]  R. Heinrichs,et al.  Traveling waves and spatial variation in the convection of a binary mixture , 1987 .

[6]  H. Tyrrell,et al.  Diffusion and heat flow in liquids , 1961 .

[7]  R. C. Weast.  Handbook of chemistry and physics , 1973 .

[8]  E. Jakeman,et al.  Soret-driven thermosolutal convection , 1971, Journal of Fluid Mechanics.

[9]  R. F. Bonner,et al.  Refractive Index-Temperature Data for Anhydrous Ethyl Alcohol , 1952 .

[10]  M. Giglio,et al.  Thermal-Diffusion Measurements near a Consolute Critical Point , 1975 .

[11]  Linz,et al.  Convection in binary mixtures: A Galerkin model with impermeable boundary conditions. , 1987, Physical review. A, General physics.

[12]  Arnold Eucken,et al.  Zahlenwerte und Funktionen aus Physik, Chemie, Astronomie, Geophysik und Technik , 1950 .

[13]  Walden,et al.  Onset of oscillatory convection in a binary fluid mixture. , 1986, Physical review letters.

[14]  Moses,et al.  Flow patterns and nonlinear behavior of traveling waves in a convective binary fluid. , 1986, Physical review. A, General physics.

[15]  P. Kolodner,et al.  The transition to finite-amplitude traveling-wave convection in binary fluid mixtures , 1987 .

[16]  P. Hohenberg,et al.  Codimension-2 bifurcations for convection in binary fluid mixtures , 1984 .

[17]  P. Kolodner,et al.  Finite-amplitude traveling-wave convection in binary fluid mixtures , 1986 .

[18]  Competing patterns in a convective binary mixture. , 1986, Physical review letters.

[19]  Moses,et al.  Multistability and confined traveling-wave patterns in a convecting binary mixture. , 1987, Physical review. A, General physics.

[20]  Surko,et al.  Oscillatory traveling-wave convection in a finite container. , 1987, Physical review letters.

[21]  J. Timmermans.  The physico-chemical constants of binary systems in concentrated solutions , 1959 .

[22]  L. Garrido.  Fluctuations and Stochastic Phenomena in Condensed Matter , 1987 .